Hardi ALPHA evo EcoDrive TWIN FORCE Instruction Book page 22

3 - Description Evo EcoDrive
DynamicFluid4 pressure regulation
Traditional fluid regulation starts when the nozzles are opened. With DynamicFluid4 the regulation is a continuous process
that continues even if the nozzles are closed. Two ceramic discs regulates the pressure and ensures quick reaction and zero
leakages. Sprayer speed, pump RPM and number of sections activated are parameters used, and the benefit is more precise
application rates from the second the sprayer begins spraying.
The DynamicFluid4 use feed forward technology based on 5 sensors that feeds the JobCom computer with data necessary
for optimal regulation. It auto-prime at start-up, starts and move the valve towards the final position immediately after the
operator makes changes. E.g. when section valves are opened or closed, the regulation valve is started at same time as the
section valve motors are started. This avoids overpressure situations e.g. after running empty and refill of main tank.
The 5 sensors are also back-up for each other and ensures the system can continue regulation even if one or more sensor
signal fails. Sensors used are:
• Sprayer speed sensor
• Flow sensor
• Pressure sensor
• Pump r.p.m. sensor
• Regulation valve opening angle sensor
The DynamicFluid4 pressure regulation features are:
• Very fast and accurate regulation when all sensors are ok, setup in menus are correct and pump, filters and valves are
in good conditions.
• Quick reacting valve when sections are turned ON/OFF and at speed changes.
• Optimized AutoSectionControl feature that predict boom sections to open and nozzle pressure.
• Optimized for different P.T.O. systems.
• Nozzle surveillance. No setup or tuning required for nozzle change.
• Warning in display if failures occur on boom plumbing, such as severe clogging of line or nozzle filters or large leakages
on hoses and fittings.
• All functions work though with degraded performance (Limp home modes), if:
Faults occur in fluid system, e.g. pump defects, clogged filters, leaking valves.
Sensor failure appear on pressure sensor, flow sensor or RPM sensor.
There is wrong setup of sprayer data in menus.
• Emergency mode if angle sensor or speed sensor fails.
Screen icons
The sprayer driver selects one of three modes Auto, Manual or Increment steps. The sprayer computer detects one of three
regulation modes Drop, Question mark or calibration jug. This makes 9 modes in total.
Auto Manual
When Automatic When one of the
Volume Rate button is Manual pressure
pressed on the SetBox. control buttons is
pressed on the SetBox.
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Increment steps
When the Volume Rate
is changed in steps
with %-up or %-down
buttons on the
Terminal.
Calibration jug
There is flow to section valves.
Nozzle size (L/min at 3 bar) has been calculated.
Drop
There is no flow to section valves.
The pump is not started or the pressure SmartValve is set to other function than spraying.
Question mark
There is flow to section valves but pressure and flow has not yet been stable, therefore
the nozzle size (L/min at 3 bar) has not been calculated.
The system uses the previously stored nozzle size.